Multiplex MENTOR Notice De Construction page 21

Glue the prepared horns 24 in the horn recesses in the elevator
11 and rudder 12 using cyano; note that the row of holes must
face the hinge line. Caution: check that the horns are the right
way round.
Figs. 18
13. Attaching the tail panels
Glue the fin 12 in the recess in the fuselage, taking care to set
it exactly at 90° to the wing and tailplane saddles. Check first,
and trim if necessary.
Fig. 19
Place the tailplane 11 on the fuselage from the underside,
check alignment carefully, and glue it in place. It must be at 90°
to the fin, and parallel to the wing saddle.
Fig. 20
14. Installing the tailwheel unit
Glue the prepared tailwheel unit 70 in the appropriate channel
in the tailplane using plenty of cyano.
Fig. 21
15. Connecting the tail pushrods
Slip the pushrod ends through the swivel pushrod connectors
25, centre the control surfaces and the tailwheel, and tighten
the grubscrews 28 to secure the pushrods.
16. Completing the wings
Remove any rough edges from the spar covers 9 / 10, then
carefully glue them in the wing panels 7 and 8, applying glue to
the bottom and both sides. Take particular care to keep the
glue away from the surfaces into which the tubular spar 50 will
be fitted later. The next step is to check that the joiner tube 50
fits, but do not attempt this until you are sure that there is no
active adhesive inside the socket. If you neglect this, you may
find that the wings can never be separated again!
Fig. 22
17. Installing the aileron servos
The aileron servos are installed in the recesses in the wing
panels 7 + 8, which are designed to accept Tiny S or HS 81
servos. Apply adhesive only to the servo mounting lugs (in
case the servos have to be replaced at any time). Deploy the
servo leads in the appropriate channels, and connect them to
the extension leads. You will need to cut small voids to house
the connectors. Connect the pre-formed end of the aileron
pushrods 30 to the servo output arms, and connect the plain
end to the swivel connectors on the aileron horns as shown.
Fig. 23
18. Checking the wing joiner system
Join the wing panels temporarily using the tubular wing spar
50. Trim the parts if necessary to obtain a close fit.
Attach the wing to the fuselage using the screws 32 and the
wing retainer straps 31, and carry out any minor adjustments
required.
Screw the wing to the fuselage again and check that everything
fits properly. Any trimming required should be completed at
this stage.
Figs. 24 + 25
19. Gluing the canopy latch tongues in place
The canopy 6 is fitted on the fuselage by first sliding it towards
the wing, then folding it down at the front.
Temporarily insert the two latch tongues 23, position them
carefully, and check that they fit correctly. Apply thick cyano to
the patterned surface, then push the latch lugs into the slots in
the canopy. Place the canopy on the model, allow the latch
tongues to engage in the latches 22, then immediately move
the canopy to exactly the right position. Wait for about one minute
for the glue to set, then carefully raise the canopy again and lift
it off. Apply more adhesive round the latch tongues if necessary.
Fig. 26
20. Installing the flight battery, receiver and receiver battery
The flight battery is housed in the compartment under the wing,
extending forward under the canopy, while the receiver should
be attached to the fuselage side next to the battery. When
installing these components please bear the stated Centre of
Gravity in mind. Stick the Velcro tape (mushroom side) 20 to
the inside of the fuselage bottom. Please note that the adhesive
on the Velcro tape is not strong enough for this application, so
it should be glued in place with cyano.
The final position of the flight battery is determined when you
balance the finished model; it should then be marked inside
the fuselage.
As the model is fitted with five servos, the speed controller's
BEC system is generally not capable of supplying the current
required. For this reason the model is designed for a separate
receiver battery. The location of this battery and the associated
switch harness is left up to the builder, and will vary according
to the model's Centre of Gravity.
Fig. 27
21. Power set:
The model is designed to be fitted with the MULTIPLEX Magi-
ster / Mentor power set, Order No. 33 2632.
The set contains the following items: Himax C 3528-1000
motor, CC PHOENIX 45 speed controller, 11 x 5.5" propeller,
driver and spinner.
Fig. 28
22. Attaching the motor bulkhead to the motor mount
Motor sidethrust and downthrust can be adjusted using the
motor mounts 35 (already fitted) and the motor bulkhead 36.
Tightening the four adjustor screws 37 flush with the bulkhead
automatically sets an asymmetrical motor thrustline of 2.5°
right sidethrust and no downthrust.
We recommend that you prepare the motor mount system as
follows: tighten the screws 38 and the adjustor screws 37
before you install the bulkhead, so that the screws cut their
own threads in the holes. If you own an M3 tap, it is a good idea
to run it through the holes to cut clean threads. It is also a good
idea to open up the through-holes in the motor bulkhead 36 to
4 mm Ø, in order to create slightly more space for the screws
38.
Bearing in mind that we are looking at the motor bulkhead
from the rear (!), we suggest the following screw settings as
the initial set-up:
Left upper adjustor screw
Right upper adjustor screw 3.5 mm = approx. seven turns
Left lower adjustor screw
Right lower adjustor screw 1.5 mm = approx. three turns
Since the lower adjustor screws initially project into the motor
mount guides, these must be left proud by 1.5 mm, as stated
above. The 2 mm difference between the upper and lower
screw settings produces the actual downthrust.
Fig. 29
Check that the screws project by the stated amounts. You may
well have to carry out minor thrustline adjustments during the
test-flying procedure.
3.5 mm = approx. seven turns
1.5 mm = approx. three turns
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